CN111684509B

CN111684509B - Structure of extended display screen

Info

Publication number: CN111684509B
Application number: CN201980000050.0A
Authority: CN
Inventors: 朱卫; 庄皓琳; 王正维
Original assignee: Jiangyin Kangrui Molding Technology Co ltd
Current assignee: Jiangsu Kangrui New Material Technology Co Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2022-01-07
Anticipated expiration: 2039-01-11
Also published as: US11212927B2; KR102435781B1; EP3712875B1; EP3712875A1; JP2021513669A; EP3712875A4; US20210227708A1; WO2020143015A1; KR20200096548A; EP3712875C0; CN111684509A; JP6965454B2

Abstract

A structure of an extended display screen is disclosed, wherein at least one side of a main base is provided with a hollow portion, and two guiding components are symmetrically arranged inside the main base along two sides of the hollow portion; at least one driving component is assembled in the main base, the driving component has a power source and can drive the driving component to move along the guiding component; a flexible screen is wound on the peripheral side of at least one rotating shaft by at least one side, the rotating shaft is rotatably arranged at the side of the driving component and forms linkage, the driving component is utilized to link the rotating shaft to move towards the outside of the main seat along the guiding component, so that the flexible screen can be gradually released from the peripheral side of the rotating shaft and is unfolded outwards, otherwise, the driving component is used to link the rotating shaft to gradually move into the main seat, and the rotating shaft furls the flexible screen.

Description

Structure of extended display screen

Technical Field

The present invention relates to a structure of an extendable display screen, and more particularly to a technical means for extending and retracting a flexible screen by using a driving component capable of moving transversely to drive a rotating shaft to move.

Background

It is a technical means to use a plurality of displays (or display screens) to combine with each other to form a large screen (or television wall) structure with a larger size specification to achieve another video output. For example: taiwan patent No. 99141387, "unified screen capable of automatically switching display screens", and patent No. 102147287, "display apparatus and method for combining display screens according to a splicing instruction", all provide typical embodiments.

In addition, in the patents OF US 2005/008463A1 "EXPANDED DISPLAY FOR CELL PHONE, PALM PILOT OR COMPUTER", US 7848091B 2 "DUAL-SCREEN MOBILE DISPLAY DEVICE", US 2012/0182295A1 "PERSONAL PORTABLE COMMUNICATION DEVICES WITH DEPLOYABLE DISPLAY SYSTEMS FOR THE DIMENSIONAL VISUAL REPEATION AND/OR PRIVACY AND METMETHODS OF USE", etc., a plurality OF movable SCREENs are also disclosed, which are used to move the SCREENs from the storage position to the deployment position in cooperation with the driving OF the rotating shaft.

The above reference data illustrates different design techniques related to conventional display screen devices in terms of structure and application. However, in practical applications, a plurality of displays (or display screens) are combined into a large screen (or tv wall) structure with a larger size, and an unavoidable interval is generated between the displays (or display screens), such that the longitudinally and transversely staggered intervals not only affect the integrity of the display content of the large screen (or tv wall), but also easily cause visual fatigue of viewers, thereby forming a loss in application.

With the technology of flexible screens becoming mature, the conventional defects should be improved by utilizing the feature that the large-area flexible screen has a small volume after being rolled.

In view of the above-mentioned disadvantages of the conventional large screen (or tv wall) structure formed by combining a plurality of displays (or display screens), the inventors of the present invention have studied and improved the disadvantages, and finally have produced the present invention.

Disclosure of Invention

The present invention provides a structure of an extendable display screen, which is to wind at least one side of a flexible screen around at least one peripheral side of a rotating shaft, and to drive the rotating shaft to perform a reciprocating transverse movement by a driving component, so that the flexible screen can be extended outwards or folded inwards, thereby forming an integral display screen with an enlarged area after being extended, and the volume and the display area can be effectively reduced after being folded, so as to facilitate storage and carrying.

Another objective of the present invention is to provide an extendable display screen structure, which has a main base capable of accommodating a driving component, and at least one side of the main base is respectively provided with a hollow portion, and the upper and lower portions of the corresponding hollow portion are respectively provided with a guiding component for guiding the driving component to extend and retract; the main seat is provided with a wing part outside the hollow part and below the hollow part respectively, and the wing part just can shield the hollow part when being folded inwards so as to form protection for the components in the main seat; when the wing parts are unfolded outwards, the preset guide sliding groove can guide the movement of the rotating shaft, so that the flexible screen can be stably unfolded according to the expected direction.

Another objective of the present invention is to provide a structure of an extendable display screen, wherein each wing portion forms a positioning portion at an end away from the main base relative to the sliding guide slot, and each positioning portion can be extended horizontally to two outer sides of the main base when each wing portion is extended outward, so that after the flexible screen is completely extended, the rotating shaft can be extended into the positioning portion, and an elastic deviation space is reserved between the rotating shaft and the front side (or the rear side) of the main base, thereby preventing the main base from being abnormally attached, and further enabling the outer side of the driving assembly to generate an elastic deviation attraction force on the rotating shaft, so as to normally pull the flexible screen to form a tense state, and effectively eliminating the wrinkles formed by the flexible screen due to the looseness.

To achieve the above objects and effects, the present invention comprises the following technical means: a hollow main base having at least one pair of hollow portions open to the outside, the main base being provided with a guiding component symmetrically disposed along the side of the hollow portion; at least one driving component, which is assembled in the main base and can move along the guiding component to extend out of the main base; a flexible screen, which is winded on the periphery of at least one rotating shaft, the rotating shaft is rotatablely arranged on the driving component and can be moved out of the side of the main seat preferentially to form linkage, when the driving component links the rotating shaft to move to the outside of the main seat along the guiding component, the flexible screen can be gradually released from the periphery of the rotating shaft to be unfolded outwards.

According to the above structure, the driving assembly has a power source, and the power source can drive the driving assembly to move along the guiding assembly.

According to the above structure, the main base has two opposite first and second hollow-out portions, two forward guiding components are symmetrically disposed inside the main base along two sides of the first hollow-out portion, and two reverse guiding components extending in reverse direction with the forward guiding components are symmetrically disposed inside the main base along two sides of the second hollow-out portion; two driving components are assembled in the main base, each driving component has a power source to drive the two driving components to move along the forward and backward guiding components respectively; when the two driving components respectively drive the first rotating shaft and the second rotating shaft to move towards the outside of the main seat along the forward and reverse guiding components, the flexible screen can be gradually released from the peripheral sides of the first rotating shaft and the second rotating shaft and can be unfolded outwards.

According to the above structure, the main seat is pivoted with a first side wing part at two sides of the first hollow part, the two first side wing parts can be folded inwards to cover the first hollow part, otherwise, the main seat can be unfolded outwards to open the first hollow part; and a second wing part is respectively pivoted at two sides of the second hollow part, the second wing part can be folded inwards to cover the second hollow part, otherwise, the second wing part can be unfolded outwards to open the second hollow part.

According to the above structure, when the two first side wing parts are folded, one side surface facing the first hollow part is respectively provided with a first side guide sliding groove connected to the side of the forward guide component, when the first side wing parts extend outwards and horizontally, the first side guide sliding groove can form sliding guide connected to the forward guide component for two ends of the first rotating shaft; when the second side wing parts are folded, one side surface facing the second hollow part is respectively provided with a second side guide sliding groove connected with the side of the reverse guide component, and when the second side wing parts are extended outwards and horizontally, the second side guide sliding groove can form sliding guide connected with the reverse guide component for two ends of the second rotating shaft.

According to the above structure, the first and second guiding chutes respectively form a positioning portion with an offset space at one end far away from the main seat, and each positioning portion protrudes out of the front or rear side of the main seat in a flush manner with the end portion.

According to the above structure, each driving component is provided with a set of linking components driven by the power source, and each set of linking components is connected to the forward and backward guiding components.

According to the above structure, the forward and reverse guiding components are forward and reverse racks arranged in opposite directions, the power sources are motors, and the linking components are output gears driven by the motors and engaged with the forward and reverse racks, respectively.

According to the above structure, the two driving components are respectively provided with two parallel main brackets, the first and second rotating shafts are respectively pivoted with a rotating shaft bracket near the two ends, the rotating shaft bracket of the first rotating shaft is pivoted with the two main brackets of one of the driving components, the rotating shaft bracket of the second rotating shaft is pivoted with the two main brackets of the other driving component, and each rotating shaft bracket has pivoting elasticity relative to the pivoted main bracket, so that the rotating shaft brackets of the first and second rotating shafts respectively generate a stretching elasticity at the two sides of the flexible screen to ensure that the flexible screen can keep a tense and flat state after being completely stretched.

According to the above structure, the main base has two parallel first and second frame strips, and the first and second side plates are respectively attached to two sides of the first and second frame strips, so as to form a hollow space between the first and second frame strips and the first and second side plates, and the hollow space forms the first and second hollow portions at two sides between the first and second frame strips.

In order to make the aforementioned objects, functions and features of the present invention more comprehensible, the following description is given with reference to the accompanying drawings:

drawings

FIG. 1 is a three-dimensional exploded structure of the present invention.

FIG. 2 is a schematic diagram of the main seat assembly of the present invention.

FIG. 3 is a schematic view of a portion of the structure of the driving assembly, the flexible screen, and the second frame strip according to the present invention.

FIG. 4 is an exploded view of the driving assembly and the shaft of the present invention.

FIG. 5 is a combination structure of the present invention when the wings are folded.

FIG. 6 is a schematic view of the present invention with the wings extended outwardly.

FIG. 7 is a top sectional view of FIG. 6.

FIG. 8 is a schematic diagram of the operation of the present invention to expand the flexible screen outwardly by two driving components.

FIG. 9 is a top sectional view of FIG. 8.

FIG. 10 is a schematic view of the flexible screen fully unfolded by two driving components according to the present invention.

FIG. 11 is a top sectional view of FIG. 10.

In the figure:

1 Main seat

11 first frame strip

111. 121 forward guide assembly

112. 122 reverse direction guide assembly

12 second frame strip

13 first side plate

14 second side plate

101 first hollow out part

102 second hollow part

15. 17 first flank part

16. 18 second wing part

151. 171 first side guide chute

161. 181 second side guide chute

152. 162, 172, 182 positioning section

2. 4 drive assembly

21. 41 power source

211. 411 drive gear

22. 42 drive assembly

221. 421 interlocking gear

23. 43 linkage assembly

24. 25, 44, 45 main support

3 Flexible Screen

31 first rotating shaft

32 second rotating shaft

311. 312, 321, 322 rotating shaft bracket

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Referring to fig. 1 to 4, it can be seen that the main structure of the present invention includes: a main base 1, two driving

components

2, 4 and a flexible screen 3; the main base 1 has a first and a second parallel frame strips 11, 12, a first and a

second side plates

13, 14 are respectively attached to two sides of the first and the second frame strips 11, 12, so that a hollow space is formed between the first and the second frame strips 11, 12 and the first and the

second side plates

13, 14, and the space forms a first and a second hollow-out

portions

101, 102 between the first and the second frame strips 11, 12 and respectively towards two sides, which are open to the outside.

A forward guide component 111 (which may be a forward rack) and a reverse guide component 112 (which may be a reverse rack) extending in a direction opposite to the forward guide component 111 are disposed in the first frame strip 11, a first wing part 15 and a second wing part 16 are respectively pivoted at two end parts of the first frame strip 11, the first wing part 15 and the second wing part 16 are respectively provided with a first sliding guide slot 151 and a second sliding guide slot 161, which are respectively connected to the sides of the forward guide component 111 and the reverse guide component 112; the second frame 12 is provided with a forward and a backward guiding members 121, 122 (which may be a forward and a backward rack) respectively corresponding to the forward and backward guiding

members

111, 112, two ends of the second frame 12 are respectively pivoted with a first and a

second side wing

17, 18, the first and the

second side wing

17, 18 are respectively provided with a first and a second side guiding sliding

groove

171, 181 respectively connected to the sides of the forward and backward guiding

members

121, 122.

In one possible embodiment, the first and second

side guide slots

151, 171, 161, 181 are respectively formed with a

bent positioning portion

152, 172, 162, 182 at an end away from the first and second frame strips 11, 12 in the same direction, and the end of the

positioning portion

152, 172, 162, 182 is protruded out of the front (or rear) side of the first side plate 13 (or the second side plate 14) in a flush manner.

The driving

components

2, 4 have the same structure and are assembled in the main seat 1 in the opposite direction, the driving

components

2, 4 have a

power source

21, 41, a driving

component

22, 42 driven by the

power source

21, 41, two

linkage components

23, 43 driven by the driving

component

22, 42, the

linkage components

23, 43 are connected to the

forward guiding components

111, 121 and the

reverse guiding components

112, 122 respectively; and the two driving

components

2, 4 are pivotally connected to a

main stand

24, 25 and 44, 45 extending in opposite directions.

In a practical embodiment, the

power source

21, 41 can be a motor and has a

driving gear

211, 411 for outputting power, the driving

component

22, 42 is a shaft, a

linking gear

221, 421 engaged with the

driving gear

211, 411 is disposed at the middle section of each shaft, the linking

components

23, 43 are output gears disposed at the two ends of each shaft, the two linking components 23 (output gears) are engaged with the two forward guiding components 111, 121 (forward racks), the two linking components 43 (output gears) are engaged with the reverse guiding components 112, 122 (output gears), the driving component 22, 42 (shaft) is driven to rotate by the power source 21, 41 (motor) through the

driving gear

211, 411 and the

linking gear

221, 421, the linking components 23, 43 (output gears) can be driven to rotate on the

forward guiding component

111, 111, 121 (forward rack) and the reverse guide members 112, 122 (reverse rack), thereby moving the driving

members

2, 4 in the direction of the forward guide members 111, 121 (forward rack) and the reverse guide members 112, 122 (reverse rack).

The flexible screen 3 passes through the outer side of the first side plate 13 (or the second side plate 14) in the middle section, and two sides of the flexible screen 3 are respectively wound around the outer sides of the first and second rotating shafts 31, 32, the first and second rotating shafts 31, 32 are respectively disposed in the main base 1 near the first and second hollow portions 101, 102, two ends of the first rotating shaft 31 respectively extend to the first side guide sliding grooves 151, 171 of the first side wing portions 15, 17, and the portions near the two ends of the first rotating shaft 31 are respectively pivoted to one end of a rotating shaft bracket 311, 312, the other end of the two rotating shaft brackets 311, 312 are respectively pivoted to the end portions of the two main brackets 24, 25, and the two rotating shaft brackets 311, 312 have pivoting elasticity relative to the pivoting elasticity between the two main brackets 24, 25, so that the two rotating shaft brackets 311, 312 can generate stretching elasticity on one side of the flexible screen 3; two ends of the second rotating shaft 32 extend to the sides of the second side guiding slots 161, 181 of the second side wings 16, 18, and the portions near the two ends of the second rotating shaft 32 are respectively pivoted to one end of a rotating shaft bracket 321, 322, the other ends of the two rotating shaft brackets 321, 322 are respectively pivoted to the ends of the two main brackets 44, 45, and the two rotating shaft brackets 321, 322 have pivoting elasticity relative to the pivoting between the two main brackets 44, 45, so that the two rotating shaft brackets 321, 322 can generate stretching elasticity on one side of the flexible screen 3.

Referring to fig. 5 to 11, it can be seen that when the folding device is folded, the driving

components

2 and 4 are accommodated in the accommodating space of the main base 1, the two first

side wing portions

15 and 17 are attached to the outer side of the first hollow portion 101, and the two second

side wing portions

16 and 18 are attached to the outer side of the second hollow portion 102 (as shown in fig. 5), so that the overall folded mechanism has a minimum volume.

When in use, the first and second

side wing parts

15, 17, 16, 18 can be pivoted outwards by 90 degrees respectively, so that the first

side guide chutes

151, 171 are respectively connected with the

forward guide components

111, 121; the second

side guide slots

161, 181 are engaged with the reverse guide elements 112, 122 (as shown in fig. 6 and 7).

Then, the two driving

components

2, 4 respectively drive the linking components 23, 43 (output gears) to move by the power sources 21, 41 (motors) through the driving

components

22, 42, so that the driving component 2 can slide along the two forward guiding

components

111, 121, and simultaneously drive the two ends of the first rotating shaft 31 to move outwards along the first

side guiding chutes

151, 171, and the driving component 4 can slide along the two

reverse guiding components

112, 122, and simultaneously drive the two ends of the second rotating shaft 32 to move outwards along the second

side guiding chutes

161, 181, and the two sides of the flexible screen 3 can gradually expand along with the outward movement of the first and second rotating shafts 31, 32 (as shown in fig. 8, 9).

Finally, when the driving

components

2 and 4 move to the end portions away from each other respectively at the

forward guiding components

111 and 121 and the

reverse guiding components

112 and 122, the two end portions of the first rotating shaft 31 can be respectively bent and embedded into the two

positioning portions

152 and 172 by the two first side sliding guiding

slots

151 and 171; the two ends of the second rotating shaft 32 can be respectively bent and inserted into the two

positioning portions

162, 182 by the two second

side guiding chutes

161, 181, and the two

side brackets

311, 312 and the two

rotating shaft brackets

321, 322 respectively generate a reverse stretching elasticity on the two sides of the flexible screen 3, so that the two sides of the flexible screen 3 can be not only completely unfolded and kept in a tensioned and flat state, but also a gap (as shown in fig. 10, 111) is left between the completely unfolded flexible screen 3 and the outer side of the first side plate 13 (or the second side plate 14) to prevent the outer side of the first side plate 13 (or the second side plate 14) from contacting the flexible screen 3 to form a crease.

In the above structure of the present invention, a scroll spring (not shown) can be disposed between the first and second

rotating shafts

31, 32 and the

rotating shaft brackets

311, 312, 321, 322, respectively, when the first and second

rotating shafts

31, 32 drive the two sides of the flexible screen 3 to be gradually expanded outward, each scroll spring is in a compressed state; when the first and

second shafts

31, 32 are inwardly closed together, the first and

second shafts

31, 32 can be rotated reversely by the restoring elasticity of the spiral springs, so as to roll up the flexible screen 3 and restore to the original folded state.

In practical applications, the driving component 4 (or the driving component 2) and the second rotating shaft 32 (or the first rotating shaft 31) can be directly omitted, one side of the flexible screen 3 away from the first rotating shaft 31 (or the second rotating shaft 32) is positioned at a position inside the main base 1 and close to the second hollow portion 102 (or the first hollow portion 101), and the driving component 2 (or the driving component 4) is used to drive the first rotating shaft 31 (or the second rotating shaft 32) to move outwards independently, so that the similar effect of unfolding the flexible screen 3 can be achieved.

In summary, the structure of the extended display screen of the present invention is not only different from the conventional structure, but also can generate a complete display effect by a simple operation, and is a novel and progressive invention, which is the belonged invention; however, the above description is only for the purpose of illustrating the preferred embodiments of the present invention, and all changes, modifications, variations, or equivalent substitutions that extend from the technical means and scope of the present invention should also fall within the scope of the claims of the present invention.

Claims

1. An extended display screen structure, comprising at least:

the hollow main seat is provided with at least one pair of hollow parts which are open outwards, and guide components are symmetrically arranged inside the main seat along the lateral sides of the hollow parts respectively;

at least one driving component is arranged in the main seat, and the driving component can move along the guide component and extend out of the main seat;

the flexible screen is wound on the peripheral side of at least one rotating shaft, the rotating shaft is rotatably arranged on the driving assembly and can be preferentially moved out of the side of the main seat to form linkage, and when the driving assembly links the rotating shaft to move towards the outside of the main seat along the guide assembly, the flexible screen can be gradually released from the peripheral side of the rotating shaft to be unfolded outwards;

the main seat is provided with a first hollow part and a second hollow part which are opposite, two groups of forward guide components are symmetrically arranged inside the main seat along the second lateral side of the first hollow part, and two groups of reverse guide components which extend reversely to the forward guide components are symmetrically arranged inside the main seat along the second lateral side of the second hollow part; the main seat is respectively pivoted with a first side wing part at two sides of the first hollow part, and the two first side wing parts can be folded inwards to cover the first hollow part, otherwise, the two first side wing parts can be unfolded outwards to open the first hollow part; a second wing part is respectively pivoted at two sides of the second hollow part, the two second wing parts can be folded inwards to cover the second hollow part, otherwise, the second wing parts can be unfolded outwards to open the second hollow part;

when the first side wing parts extend outwards and horizontally, the first side guide sliding grooves can form sliding guide for connecting the forward guide components to two ends of the first rotating shaft; and when the second side wing part extends outwards and horizontally, the second side guide sliding groove can form sliding guide for connecting the two ends of the second rotating shaft with the reverse guide component.

2. The extendable display screen structure of claim 1, wherein said driving member has a power source, said power source being capable of driving said driving member to move along said guiding member.

3. The extendable display screen structure of claim 2, wherein two driving assemblies are disposed in the main housing, each driving assembly having a power source for driving the two driving assemblies to move along the forward and backward guiding assemblies respectively; when the two driving assemblies respectively link the first rotating shaft and the second rotating shaft to move towards the outside of the main seat along the forward guiding assembly and the reverse guiding assembly, the flexible screen can be gradually released from the outer peripheries of the first rotating shaft and the second rotating shaft to be unfolded outwards.

4. The extendable display screen structure of claim 1, wherein the first and second side guide slots each form a positioning portion with an offset space at an end thereof away from the main seat, and each positioning portion protrudes out of the front or rear side of the main seat in a flush manner at an end thereof.

5. The extendable display screen structure of claim 3, wherein each driving assembly has a set of linkage assemblies driven by the power source, and each linkage assembly is connected to the forward and backward guiding assemblies.

6. The extendable display screen structure of claim 5, wherein the forward and reverse guide elements are forward and reverse racks arranged in opposite directions, respectively, the power source is a motor, and the linkage element is an output gear driven by the motor and engaged with the forward and reverse racks, respectively.

7. The extendible display screen structure of claim 3, wherein the two driving units respectively have two parallel main frames, the first and second shafts are respectively pivotally provided with a shaft bracket near the two ends, the shaft bracket of the first shaft is pivotally connected to the two main frames of one driving unit, the shaft bracket of the second shaft is pivotally connected to the two main frames of the other driving unit, and each shaft bracket has pivoting elasticity relative to the pivotally connected main frame, so that the shaft brackets of the first and second shafts respectively generate a tensile elasticity at the two sides of the flexible screen to ensure that the flexible screen can maintain a tension and flatness state after being fully extended.

8. The extendible display screen structure of claim 5, wherein the two driving units respectively have two parallel main frames, the first and second shafts are respectively pivoted with a shaft bracket near the two ends, the shaft bracket of the first shaft is pivoted on the two main frames of one driving unit, the shaft bracket of the second shaft is pivoted on the two main frames of the other driving unit, and each shaft bracket has pivoting elasticity relative to the pivoted main frames, so that the shaft brackets of the first and second shafts respectively generate a stretching elasticity at two sides of the flexible screen to ensure that the flexible screen can maintain a tension and flatness state after being fully extended.

9. The extendible display screen structure of claim 6, wherein the two driving units respectively have two parallel main frames, the first and second shafts are respectively pivotally provided with a shaft bracket near the two ends, the shaft bracket of the first shaft is pivotally connected to the two main frames of one driving unit, the shaft bracket of the second shaft is pivotally connected to the two main frames of the other driving unit, and each shaft bracket has pivoting elasticity relative to the pivotally connected main frames, so that the shaft brackets of the first and second shafts respectively generate a stretching elasticity at two sides of the flexible screen to ensure that the flexible screen can maintain a tension and flatness state after being fully extended.

10. The extendable display screen structure of claim 3 or 4, wherein the main base has a first frame strip and a second frame strip parallel to each other, and a first side plate and a second side plate are respectively attached to two sides of the first frame strip and the second frame strip, so that a hollow accommodating space is formed between the first frame strip and the second frame strip and between the first side plate and the second side plate, and the accommodating space forms the first hollow portion and the second hollow portion at two sides between the first frame strip and the second frame strip.

11. The extendable display screen structure of claim 5, wherein the main base has a first frame strip and a second frame strip parallel to each other, and a first side plate and a second side plate are respectively attached to two sides of the first frame strip and the second frame strip, so as to form a hollow space between the first frame strip and the second frame strip and between the first side plate and the second side plate, and the hollow space forms the first hollow portion and the second hollow portion at two sides between the first frame strip and the second frame strip.

12. The extendable display screen structure of claim 6, wherein the main base has a first frame strip and a second frame strip parallel to each other, and a first side plate and a second side plate are respectively attached to two sides of the first frame strip and the second frame strip, so as to form a hollow space between the first frame strip and the second frame strip and between the first side plate and the second side plate, and the hollow space forms the first hollow portion and the second hollow portion at two sides between the first frame strip and the second frame strip.

13. The extendable display screen structure of claim 7, wherein the main base has a first frame strip and a second frame strip parallel to each other, and a first side plate and a second side plate are respectively attached to two sides of the first frame strip and the second frame strip, so as to form a hollow space between the first frame strip and the second frame strip and between the first side plate and the second side plate, and the hollow space forms the first hollow portion and the second hollow portion at two sides between the first frame strip and the second frame strip.

14. The extendable display screen structure of claim 8, wherein the main base has a first frame strip and a second frame strip parallel to each other, and a first side plate and a second side plate are respectively attached to two sides of the first frame strip and the second frame strip, so as to form a hollow space between the first frame strip and the second frame strip and between the first side plate and the second side plate, and the hollow space forms the first hollow portion and the second hollow portion at two sides between the first frame strip and the second frame strip.

15. The extendable display screen structure of claim 9, wherein the main base has a first frame strip and a second frame strip parallel to each other, and a first side plate and a second side plate are respectively attached to two sides of the first frame strip and the second frame strip, so that a hollow space is formed between the first frame strip and the second frame strip and between the first side plate and the second side plate, and the hollow space forms the first hollow portion and the second hollow portion at two sides between the first frame strip and the second frame strip.